* {
    margin: 0;
    padding: 0;
}
.row > div {

}
.first_title_class{
    height:300px;
    background-image:url("../../images/chenhao.png");
    background-repeat: no-repeat;
    background-size: 100% 100%;

}
.container-fluid{
    min-height: 600px;
    min-width: 500px;


}
.container-fluid> .first_title_class{
    margin-left: -15px;
    margin-right: -15px;
}
.left_class{
    min-width: 100px;
}
.right_class{
    min-width: 100px;
    margin-bottom: 8rem;
}

.left_class, .right_class ,.container-fluid{
    height: 900px!important;
}

.left_class, .right_class{
    overflow-y: auto;
}

.left_class div,.bd_class div{
    margin: 1rem 3rem 0px 3rem;
    text-align: center;
    border: 1px solid #ddd;
    padding: 1rem;
    font-size: 1.5rem;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    color: rgb(0, 188, 212);

}


.right_title {
    width: 12%;
    float: right;
    text-align: center;
    border: 1px solid #ddd;
    padding: 1rem;
    font-size: 1.5rem;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    color: rgb(0, 188, 212);
    position: fixed;
    right: 1px;
    top: 400px;
    height:400px;
    overflow-y: scroll;
    background-color: #FFFFE0;
    border-radius: 45px 0 45px 0;
}

.right_title div{
    margin: 1rem 3rem 0px 2rem;
    padding: 0px 1rem 0 1rem;
    text-align: center;
    border: 1px solid #ddd;
    font-size: 1rem;
    font-family: Verdana, Arial, Helvetica, sans-serif;
    color: black;
    border-radius: 30px;
}
.right_title  div:hover{
    background-color:#DCDCDC;
    color:#FFFFFF;
}


.left_class div:first-child,.bd_class div:first-child,.nav_class{
    margin-top: 2rem;
}

.left_class  div:hover,.bd_class  div:hover
{
    background-color:#DCDCDC;
    text-indent: 2rem;
    color:#FFFFFF;

}


.bd_class div{
    color: #333;
}


.bd_class  div:hover{
    text-indent: 5rem;
}

.hd_class{
    position: fixed;
   width: 100%;
    right: 0;
    bottom: 0;
    height: 44px;
    line-height: 44px;
    padding: 0 15px;
    background-color: #eee;
}


.menu__list{
    padding-top: 1rem!important;
}
.nav_class,.right_title{
    display: none;
}
.nav_class{
    padding-bottom: 5rem;
}
.nav_class .layui-card-body{
    padding: 1rem 5rem;
}